Steam-engine governor



PATENT Garros.

EEWARI) WRIGHT, 0F WORCESTER, MASSACHUSETTS.

STEAM-ENGINEGOVERNOR.

Y sPEcrFIcATIoN-forming part of Letters Patent No. 245,688, dated August 16, 188.1.

Application tiled March'12, 188]. (Model.)

To all whom tt may concern.

Bc it known that l, EDWARD WRIGHT, of Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements inSteam-Engine Governors; and I declare the following to be a description of my said invention, sufficiently full, clear, and exact to enable others skilled in the art to which it a-ppertains to make and use the saine, reference being had to the accompanying drawings, which form a part of this specification.

My present invention relates to certain iinprovements in governors for steam-engines, the objects in view being simplicity of construction, efticiency of action, and convenience of adjustment. These objects I attain by mechanism, substantially such as shown in the accompanying drawings, the constructive features of which are hereinafter described, and the particular subject-matter'claimed detinitely specified.

v In the drawings, Figure l is an elevation view of my improved governor mechanism,the governor-standard being shown in section in direction of line av. Fig. 2 is a top or horizontai view, with the valve mechanism shown in section in direction of line y. Fig. 3 is an elevation view, looking toward the inner end of the governor-spindle. Fig. 4 is a vertical scctional view through the valve-chamber in direction of line z z; and Fig. 5 is a sectional view ot' the valverod cap on a larger scale.

Thereferenee-letter A denotes the valve'box, provided with a central cylindrical chamber, A', in which the valve B is located, said chamber being furnished atI its opposite sides with suitable valve seats and ports, a. a, as shown.

A2 and A3 respectivelyindicate the inlet and exit passages for the steam through the valveboX. The steam, flowing in the direction indicated by the arrow, passes freely into theinterior of the chamber A' and valve B; thence out the ports a a and passage A3 to the engine. Suitable screw-threaded or flanged hubs are provided about the passages A2 A3, for convenient attachment with the induction-pipe of the engine.

The valve B is made in the form of a rect angular open frame,hung to swing at the central axial line within the cylindrical chamber A', so that its side bars, b b, will open and l close the ports a, the valve being in balance by equal steam-pressure on each of its sides. 'The valve has a spindle, B', extending` through a packing-bushing, C, screwed into a suitable (see Fig. 2,) and said spindle is made with a beveled shoulderc, that tits against a corre spondingbev. lon the bushingC, with a ground joint, so that the pressure ot' steam holding the bevels together serves to make a tight bearing without other packing.

A screw-center,d, may be used in the opposite side ot the valve, to prevent any jarring or shaking of the valve, although this screw-ccnter may be omitted, it' desired.

The faceplate of the valve-box is made with a central boss for iitting into the circular end of the chamber A', and said plate is secured to the box by screws passing through itsiiange, as indicated. The arrangement of the parts permits of the castings being conveniently bored out for accurately tittingthe valve-seats.

D indicates the governor-balls and their levers, formed as shown, and pivoted to suitahle arms or ear-pieces on the revoluble sleeve E, which latter is furnished with a pulley or gear wheel, E' for operating the parts.

F indicates the bearing piece or stud on which the sleevcE is supported and revolves. Said stud is formed hollow, with a suitable retaining-head at its outer end, and has its inner end'rigidly secured in an arm or bracket, G, projecting from the valve-box A, by means of a set-screw, f, or otherwise.

H indicates a tube or springbearing sti-p, screw-threaded to and within the inner end of the hollow stud F, and having a suitable milled or other formed head, h, whereby it can be screwed in or out for varying the tension of the spring K and adjusting the governor for different speeds.

I indicates the valve-operating rod extending through the center or axis of the supporting-stud F and tube H, and having its end connected for action with the valve B, in the present instance by means of a sliding rack, L, which meshes by gear-teeth with an arm, M, fixed to and depcndin g from the valve-stein B'. The other end of said rod I is provided with a head, I', of somewhat greater diameter than the rod, which serves as a guiding-bearing in the end of the hollow stud F, and as an abuthub or boss on the face-plate of the valve-box, i

IDO

ment for the end of the spring K, which latter is coiled about the Arod I, between its head I/ and the head of the tube H, as indicated in Fig. 1.

N indicates a bearing cap or button placed over and revolving loose on the end of rod I, or its head I', and which serves as a seat for the ends Dl of the governor-ball levers, which rest against and slide on the flat top surface of said cap as the balls swing outward or inward. Said cap is made as shown in Fig. 5, and is furnished with an anti-friction disk, n, of rawhide or other suitable material, against which the end oi' the rod bears. I

The action of my improved mechanism will be understood bythe description and draw ings. The reciprocation of the rod Ibythe movement of the ball-levers oscillates the arm M and valve B and effects thevibration ofthe valve sides b past the ports a ce, allowing more or less steam to pass, as required. l In lien of the rack L the rod I may be conl smaller part of' said spindle and provided with a bevel end face coming in direct contact with the bevel shoulder, whereby the pressure of steam will hold the bevels together to make a l tight bearing without other packing', substantially and for the purpose set forth.

Witness my hand this 9th day of March, A. D. ,1881.

EDWARD WRIGHT. Witnesses:

UHAs. H. BURLEIGH, S. R. BARTON.

the adjustable bushing (l, surrounding the 

